Sawmill set-works.



z 0 m m m. u A d e t n e t a. 0.. N 0 T L A w 0 7 7 0 7 0 N SAWMILL SETWORKS. (Application filed Apr. 28/1960.

2 Sheeis-Shet I.

(No Model.)

v W f y n4: warns #:Yzns co.. rumouma, WASHINGTON nut.

No. 707,370. Patenied Aug. I9, I902.

J. WALTON.

SAWMILL SET WORKS.

(Application filed Apr. 28, 1900.) (No Model.)

- V 2 Sheets-Sheet 2.

THE Mamas PETERS co. PHOTQUTHQ. WASHKNGTDN. D c.

llNiTED STATES PATENT OFFICE.

JOHN WALTON, OF ERIE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOALLIS-OHALMERS COMPANY, A CORPORATION OF NEW JERSEY;

SAWMILLFSET-WORKS.

SPECIFICATION forming'iloart of Letters Patent No. 707,370, dated August19, 1902.

Application filed April 28, 1900. $eria1No. 14,757. (No model.)

do hereby declarefthe following to be a full,-

clear, and exact description of the invention,- such aswill enableothers skilled in the art to which-it appertainsto make and use thesame.

This invention relates to sawmill set-.

works; and it consists in certain improvements in the constructionthereof, as Will be hereinafterfully, described, and pointed out in theclaims.

More particularly, the invention relates to that class of set-workswhich are actuated by steam.

The object of theihvention is to provide a set works which can operateupon the carriage mechanism to produce any desired thickness of boardsor lumber with accuracy.

Figure 1 shows a transverse section of a sawmill-carriage havin g theset-works formed according to my invention thereon. Fig. 2 shows a'longitudinal section through the steam actuating mechanism of theset-works. Fig. 3 shows an end view, from the left of Figs. 1 and 2, ofsaid steam actuating mechanism.

A marks the sawmill-carriage ,timber; a, the usual box secured thereto;a, the ordinary shaft or axle; 00 the carriage-wheel, and B the track onwhich the carriage runs. Arranged on the carriage-timber is theheadblock O, having the usual slides c on top thereof. Arranged to moveon this slide a is a knee D, having the usual rack 01 on thebottomthereof. Running longitudinally of the carriage is a shaft E, and onthis is secured a pinion (shown on dotted lines) which is arranged tomesh the rack 01 and to produce the movement of the knee D. Also securedto this shaft D is a ratchetwheel F. A ratchet-lever G is journaled onthe shaftand is provided with the pawl g in proper position to operateon the ratchet-wheel F as the ratchet-lever is oscillated.

It will be readily observed that for any given oscillation of the leverF a certain movement is given to the knee D and that this movement isvaried as the amount of movement on the ratchet-wheel F is varied. Iftherefore the ratchet-wheel F is given successive movements, each equal,the knee will be given successivelya number of equal movements. Thiswill move a log in place so as to produce boards of equal thicknesses.It is of course desirable to have the mechanism arranged so that boardsof different thicknesses may be produced and that their thickness bereadily controlled. I accomplish this as follows: Extending from thetimber A is the bracket 1. Secured to this bracket lie thesteam-cylinder J, in whichis arranged a working pistonK. Extending fromthis working piston K is a piston-rod 70. A pitman L extends from thepiston-rod 7:; to a block H on the ratchet-lever G. As the piston K isreciprocated the lever G is reciproeating in proportion to the length ofmovement of the piston K. Arranged in the cylinder J, back of the pistonK, is a settingpiston M. Extending from this piston is a piston-rod m,which passes out of the cylin der through a stuffing-box of-the usualconstruction. A cross-head M is secured to the outer end of thispiston-rod 'm, and links we connect the ends of the cross-head M withthe forked lever N. The forked lever N extends over the cylinder and ispivoted at n at the base of the cylinder. Aquadrant N is provided andhas in the path of the lever N a series of holes 0%. A similar openingis arranged in the lever N in position to come into register with theopenings 'n as the lever N is, moved. A pin n is passed through thelever and an opening it to lock the lever N in the desired position andto thus lock the piston M in its position: Extending into the end of thepiston-rod m is an opening m which, with the ports m forms a means ofcommunication between the two parts-of the cylinder atthe opposite sidesof the piston M. Beneath the cylinder is arranged a steamchost 0, havingan inlet 0 and an exhaustpassage 0 The ends of the steam-chest arearranged to form the working portions, and in these are placed thevalves 10 and 10 These are connected by a central hollow portion' of thevalve 13. The ports 0 0 lead from the steam-chest and are controlled bythe enlarged portion 7.: of the piston-rod 0 enters valve 19 and theports 0 and o extend from the opposite end of the steam-chest and arecontrolled by the valve 29. Extending from the port 0 is a portextension Q, into which a port-tube Q passes, forming a sliding fit Withan opening q in the end of the cylinder. The port 0 extends from thefront end of the working piston and may be termed the exhaust-port. Itforms a connection with the exhaust-opening through the port 19 and thecentral part of the valve. In the position that the parts are shown thevalves 19' and 19 have closed the ports 0 and o and have opened theports 0 and 0 With this position of the parts the steam passes from thesteamchest through the port 0, extension Q, porttube Q into the end ofthe cylinder J, and from there passes through the opening m and ports172 into the rear end of said cylinder. This of course balances thesettingpiston M, so that it may be moved to any part of the cylinder.The port 0 being open at the front end of the cylinder allows all steamto exhaust therefrom, and as the working piston K is subjected to thefull force of the steam it is in its extreme forward position. Extendingfrom the valve 19 is a valvestem 19 and secured to this is a hand-leverR. The hand-lever R is connected with the piston-rod K bya link 7 and isarranged to pass by a quadrant R, on which are a series of notchescorresponding to the openings 02. By moving the hand-lever along thequadrant R the valve 19 is moved so as to open the ports 0 and 0 and atthe same time closes the ports 0 and o. This permits of an exhaust fromthe cylinder back of the working piston and admits steam to the frontend of the cylinder, and thus forces the working piston backward. Thismovement of the piston follows immediately as the valve reaches itsforward position, so that the lever B may be moved along with the pistonto one of the notches or indications r', corresponding to the opening a,in which the pin 92 is placed. This will leave the ports 0 and 0 openuntil the piston has moved to nearly its extreme rear position, and aslight further movement of the piston closes all the ports 0, o, 0 and 0Just before the piston reaches the limit of its rearward movement theplug 7r, arranged on the cylinder K, enters the opening m. It does notform a steam-tight joint therewith, but allows a small leakage of steam.This cushions the working piston K. As this movement takes place theratchet-lever G is carried backward, the dogs 9 moving over theratchet-teeth to the new position. The handlever is then moved forward,moving the valve so as to open the ports 0 and 0 This allows the steamin the front part of the cylinder to exhaust and admits steam to therear of the cylinder, thus forcing the working piston K forward, andthis operating the lever G moves the ratchet-wheel F. As the pistonapproaches its extreme forward position the the port 0 It does not forma steam fit with this port but approximately closes the port 0 and thetrapped steam cushions the end of the movement to the working piston K.The hand-lever is moved with the piston movement to the end of thequadrant. It will be readily observed that there is given with eachmovement of the working piston K an equal movement to the ratchet-wheelF, and consequently the knee D, so that a forward or feeding movement ofthe log is accomplished with each movement of the working piston. If athicker board is desired, all that is necessary to accomplish this is togive to the Working piston a longer movement, and this is effected bymoving the setting-piston toward the rear end of the cylinder andlooking it there by means of the pin 07.. Practically any thicknessdesired may be gotten in this way. of thicknesses may be had, I providethe upper end of the ratchet-lever G with a series of holes 9 andprovide the block H with a hole h, which may be brought into registerwith these holes. A pin 72, is passed through the opening it and a hole9 to lock the block in any position. By moving the block H upwardly, soas to lengthen the ratchet-lever G, a given movement of the Workingpiston of course produces a shorter movement of the ratchet-Wheel, andconsequently a slighter feeding movement. By means of thus varying theposition of the block H and the lever N practically any thickness ofboard can be made, even down to the most minute cliit'en ences.

The port-tube Q might be dispensed with; but the initial movement of thepiston K would be slow, because steam would have to pass by the plug 76"through the port m and this is not desirable, as a rapid movement is oneof the objects to be attained. By making a separate opening the piston Kis immediately subjected to the full steam-pressure.

It will be noted that the valve will be moved by the piston-rod 70, ifthe valve-lever is restrained, in a direction which will close thevalve. I prefer to make the valve, so that when brought to normal, itwill just close the two inlet-ports, but still have a sufficient lapsebut that steam will leak through, thus neutralizing the effect. lViththis construction, therefore, it is possible to very nearly locate theposition of the working piston by simply looking the valve-leverRatthepredetermined notch, because with the lever at this notch the valvewill be brought to normal with a desired position of the piston, so thatthe piston is practically locked in this position. It is only becausethis method lacks that accu racy which is necessary in this device thatthe setting piston in other mechanism is added. By so connecting thevalve-lever with the piston-rod the speed at which the piston moves maybe regulated, because as the valvelever is moved, opening the port infront of In order that a great variation VIIS the piston, the movementof the piston itself tends to close it, so that the travel of the pistonfollows the movement of the valve-lever and is fast or slow according asthe valve-lever is fast or slow.

It will be noted that the cushion device operates only at the end of thestroke, so that the central parts of the stroke may be as rapid as theactuating fluid or steam will move the mechanism. It will also be notedthat the knee is moved forward by the ratchet mechanism. The cushiondevice operating at the end of the stroke slows down the speed of themechanism before it reaches a positive step, so that the mechanismactuated by the ratchet is not carried by the position necessary toproduce the proper thickness of board and a proper succeeding movementof the mechanism. By a ratchet mechanism I wish to include any mechanismadapted to move into engagement with a movement of the engine in onedirection and to move out of en gagement with the reverse movement.

What I claim as new is- 1. In a sawmill set-works, the combination withthe log-moving mechanism; of an engine for actuating said mechanismcomprising a working piston a cylinder in which said piston operates;and means for lengthening or shortening the Working portions ofsaidcylinder for varying the movement of the setworks.

2. In a sawmill set-works, the combination with the log-movingmechanism; a working piston for actuating said mechanism; a cylinder inwhich said piston operates; a settingpiston in said cylinder; and meansfor looking the setting-piston in different positions in said cylindervarying the working length of Said cylinder.

3. In a sawmill set-Works, the combination with the knee; aratchet-lever for effectinga movement of said knee; a block on saidratchet-lever; means for locking said block at different points uponsaid lever to vary the movement of said lever With an equal move ment ofthe block; a working piston connect ed with said block; a cylinder inwhich said piston is arranged to operate; and means for lengthening orshortening the working portions of said cylinder for varying the movement of said piston.

4. In a sawmill set-works, the combination with the knee; aratchet-lever for efiecting movement of said knee; a block on saidratchet-lever; means for locking said block at difierent points uponsaid lever to vary the movement of said lever With an equal move ment ofthe block; a working piston connected with said block; a cylinder inwhich said piston is arranged to operate; a setting-piston in saidcylinder; and means for locking said piston in different positions insaid cylinder for varying the working length of said cylinder.

5. A sawmill set-works comprising the combination with a log-movingmechanism; of an engine arranged to operate said log-moving mechanism;and automatic means for causing a variation from the speed at which thelog-moving mechanism would be driven but for said means by the activepower of the engine from a rapid intermediate movement to a slow endmovement.

6. A sawmill set-works involving the combination with a log-movingmechanism; an

engine arranged to'operate said log-moving mechanism; means for causinga variation from the speed at which the log-moving mechanism would bedriven but for said means by the active power of the engine, from arapid intermediate movement to a slow end movement; and a positive stopfor engaging said mechanism during the slow end movement.

7. A sawmill set-works involving the com bination with a log-movingmechanism, comprising a ratchet device; of an engine arranged to operatesaid lo -moving mechanism through said ratchet device; and means forcausing a variation in the speed at which the log-moving mechanism isdriven from a rapid intermediate movement to a slow end movement.

8. A sawmill set-works, involving the combination with a log-movin gmechanism; of an engine comprising a working piston arranged to operatesaid log-moving mechanism; and means for causing a variation from thespeed at which the log-moving mechanism would be driven but for saidmeans by the active power of the engine from a rapid intermediate 'action to a slow end movement, by similarly varying the speed of thepiston.

9. A sawmill set-works involving the combination with a log-movingmechanism, comprising a ratchet device; of an engine to operate saidlogmoving mechanism through said ratchet device; and means for causing avariation in the speed at which said log-moving mechanism is driven,from a rapid intermediate movement to a slow end movement, by similarlyvarying the speed of the piston.

10. A sawmill set-works involving the combination with the log movingmechanism comprising a ratchet device; of an engine comprising a workingpiston for operating said logmoving mechanism through said ratchetdevice; means for causing a variation from the speed at which thelog-moving mechanism would be driven but for said means by the activepower of the engine from a rapid intermediate movement to a slow endmovement; and means for varying the extent of movement of the log-movingmechanism with a single movement of the piston.

11. A sawmill set-works involving the combination with the logmovingmechanism, comprising a working piston for operating the said log-movingmechanism; means for causing a variation from the speed at which thelog-moving mechanism would be driven but for said means from a rapidintermediate movement to a slow end movement; means for varying theextent of movementof the &

log-moving mechanism with a single movement of the piston; and apositive stop arranged to come into engagement during the slow endmovement of the mechanism.

12. A sawmill set-works involving the combination With the log-movingmechanism comprising a ratchet device; of an engine comprising a workingpiston for operating said log moving mechanism through said ratchetdevice; means for causing a variation from the speed at which thelog-moving mechanism would be driven but for said means by the activepower of the engine from a rapid intermediate movement to a slow endmovement by a similarly varying speed of the piston; and means forvarying the extent of a single movement of the log-moving mechanism byvarying the extent of movement of the piston.

13. A sawmill set-works involving the combination with the log-movingmechanism, comprising a ratchet device; of an engine comprising aworking piston for operating said logmoving mechanism through saidratchet device; means for causing a variation from the speed at whichthe log-moving mechanism would be driven but for said mechanism by theactive power of the engine from a rapid intermediate movement to a slowend movement; means for. varying the extent of movement of thelog-moving mechanism with a single movement of the piston; and apositive stop for engaging said mechanism during a slow end movement.

14. A sawmill set-works, involving the combination with a log-movingmechanism, comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device comprising a working piston; and ameans for causing a variation in the speed at which the log-movingmechanism is driven from a rapid intermediate movement to a slow endmovement comprising a cushion device arranged to operate only at the endof the stroke of the piston.

15. A sawmill set-works involving the combination with a log-movingmechanism, comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device comprising a working piston; andmeans for causing a variation in the speed at which the log-movingmechanism is driven from a rapid intermediate movement to a slow endmovement, comprising a cushion device arranged to operate only at theend of the stroke of the piston; and a positive stop for the engine.

16. A sawmill set-works involving the combination of a log-movingmechanism, comprising a ratchet device; an engine for actuating saidmechanism, comprising a working piston; means for causing a variation inthe speed at which the log-moving mechanism is driven from a rapidintermediate movement to a slow end movement, comprising a cushiondevice arranged to operate only at the end of the stroke of the piston;and means for varying the movement given to the logmoving mechanism by asingle stroke of the piston.

17. A sawmill set-works involving the combination of a log-movin gmechanism comprising'a ratchet device; an engine for actuating saidmechanism through said ratchet device, comprisinga working piston; meansfor causing a variation in the speed at which the logmoving mechanism isdriven from a rapid intermediate movement to a slow end movement,comprising a cushion device arranged to operate only at the end of thestroke of the piston; and means for varying the stroke of the piston tovary the movement given to the log-moving mechanism.

18. Asawmill set-works involving the combination of the log-movingmechanism; an engine for actuating said mechanism, comprising a workingpiston; means for causing a variation in the speed at which thelog-moving mechanism is driven from a rapid intermediate movement to aslow end movement, comprising a cushion device arranged to operate onlyat the end of the stroke of the piston; a positive stop; and means foradjusting the position of said stop to vary the stroke of the piston.

19. A sawmill set-works involving the combination with the log-movingmechanism, comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device, comprising a working piston;means for causing a variation in the speed at which the log-movingmechanism is driven from a rapid intermediate movement to a slow endmovement, comprising a cushioning device arranged to operate only at theend of the stroke of the piston; a positive stop; and means foradjusting the position of said stop to vary the stroke of the piston.

20. A sawmill set-works involving the combination of the log-movingmechanism; an engine for actuating said mechanism, comprising a workingpiston; means for causing a variation in the speed at which thelog-moving mechanism is driven from a rapid intermediate movement to aslow end movement, comprising a cushioning device arranged to operateonly at the end of the stroke of the piston; a positive stop; and meansfor adjusting the cushion device and positive stop to vary the stroke ofthe piston and the point in the stroke of the piston at which thecushion device begins to operate.

21. A sawmill set-works involving the combination with the log-movingmechanism comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device comprising a Working piston; meansfor causing a variation in the speed at which the log-moving mechanismis driven from a rapid intermediate movement to a slow end movement,comprising a cushioning device arranged to operate only at the end ofthe stroke of the piston; a positive stop; and means for adjusting thecushioning device IIO and positive stop to vary the stroke of the atingsaid mechanism, comprising a working piston; means for causing avariation in the speed at which the log-moving mechanism is driven froma rapid intermediate movement to a slow end movement, comprising acushion device arranged to operate only at the end of the stroke of thepiston, said cushion device comprising a plunger and fluid-chamberarranged to be brought into action only at the end of the stroke of thepiston, and to imprison acushioning fluid by said action; means forpermitting a gradual escape of said cushioning fluid to allow themechanism to move to a positive stop; said stop; and means for adjustingsaid stop to vary the stroke of the piston and the action of thelogmoving mechanism.

23. A sawmill set-works involving the combination of the log-movingmechanism; an engine for actuating said mechanism,comprising a workingpiston, a positive stop arranged to limit the stroke of the piston;means for ad'- justing said stop to vary the stroke of the piston andthe action of the log-moving mechanism; means for causing a variation inthe speed at which the log-moving mechanism is driven from a rapidintermediate movement to a slow end movement, comprising a cushioningdevice on said stop arranged to be brought into action only at the endof the stroke of the piston, said cushion device being arranged to beadjusted with the stop.

24. A sawmill set-works involving the combination of the log-movingmechanism comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device,comprisinga working pistonapositive stop arranged to limit the stroke of the piston; means foradjusting said stop to vary the stroke of the piston and the action ofthe logmoving mechanism; means for causing avariation in the speed atwhich the log-moving mechanism is driven from a rapid intermediatemovement to a slow end movement, comprising a cushioning device on saidstop arranged to be brought into action only at the end of the stroke ofthe piston, said cushioning device being arranged to be adjusted withthe stop.

25. A sawmill set-works involving the combination of the log-movingmechanism comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device, comprising a working piston;means for causing a variation in the speed at which the log-movingmechanism is driven, from a rapid intermediate movement to a slowmovement at each end, comprising a cushioning device arranged to operateonly at the ends of the stroke of the'piston; positive stops at bothends of the stroke of the piston for controlling the length of thestroke; and means for adjusting the position of one of said stops tovary the stroke of the piston and the action of the log-movingmechanism.

26. A sawmill set-works involving the combination of the log-movingmechanism comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device, comprising a working piston;means for causing a variation in the speed at Which the log-movingmechanism is driven from a rapid intermediate movement to a slowmovement at each end, comprising a cushioning device arranged to operateonly at the ends of the stroke of the piston; positive stops at the endof the stroke of the piston for controlling the length of the stroke;means't'or varying one of said stops and the cushion device to vary thestroke of the piston and the point in the stroke of the piston at whichthe cushion device is brought into action.

27. A sawmill set-works involving the combin-ation of the log-movingmechanism comprising a ratchet device; an engine for actuating saidmechanism through said ratchet device comprising a working piston; meansfor causing a variation in the speed at which the log-moving mechanismis driven, from a rapid intermediate movement to a slow movement at eachend, comprising cushion devices arranged to operate only at the ends ofthe stroke of the piston, said cushion devices each comprising a plungerand fluid-chamber arranged to be brought into action only at the ends ofthe stroke of the piston and to imprison a cushioning fluid by saidaction; means for permitting a gradual escape of said cushioning fluidto allow the mechanism to move to positive stops for each end of thestroke; and means for adjusting one of said stops to vary the stroke ofthe piston and the action of the log-moving mechanism.

28. Asawmill set-works involving the combination of the log-movingmechanism comprising a ratchet device; an enginefor actuating saidmechanism through said ratchet device comprising a working piston; stopsarranged at each end of the piston and in position to limit the strokeof the piston; means for causing a variation in the speed at which thelog-moving mechanism is driven from a rapid intermediate movement to aslow movement at each end, comprising cushioning devices carried by saidstops, said cushioning devices each comprising a plunger andfluid-chamber, arranged to be brought into action only at the ends ofthe stroke of the piston and to imprison a cushioning fluid by saidaction; means for permitting a gradual escape of said cushioning fluidto allow the mechanism to move to a positive stop; and means foradjusting one of said stops and the cushioning mechanism to vary thestroke of the piston at the point at which the cushion device is broughtinto action.

29. In a sawmill set-works, the combination of the log-moving mechanism;a working piston foractuatingsaid mechanism; a cylinder in which saidpiston operates; a setting-piston arranged in said cylinder; means forlooking the said setting-piston in different positions in said cylinder;an exhaust-port extending through said setting-piston; a plug on theworking piston arranged to enter said exhaust-port, said port and plugbeing of such size relatively to each other that the plug approximatelybut not entirely closes said port.

30. In a sawmill set-works, the combination with the log-movingmechanism; of an engine for actuating said set-works comprising aworking piston, and a cylinder in which said piston operates; means forlengthening or shortening the working portions of said cylinder forvarying the movement of said working piston; a valve for controlling themovement of fluid to and from said cylinder; a valve-lever for operatingsaid valve; a connection for connecting said lever with the workingpiston, whereby said piston forms a moving fulcrum for the lever.

31. In asawmill set-works, the combination with the log-movingmechanism; of an engine for actuating said set-works comprising aworking piston and a cylinder in which said piston operates; means forlengthening or shortening the working portions of said cylinder forvarying the movement of said working piston; a valve for controlling themovement of fluid to and from said cylinder; a valve-lever for operatingsaid valve; a connection for connecting said lever with the workingpiston; and means for locking said lever at various positions in properrelation to the means varying the length of the working cylinder toefiect a secondary movement of the valve after the setting of saidvalvelever to bring the valve to normal.

32. In a sawmill set-works, the combination of alog-moving mechanism;the working piston, K, for moving said mechanism; a cylinder in whichsaid working piston operates; a setting-piston in said cylinder;piston-rod, m, extending from said setting-piston; the lever, N; meansfor connecting said lever with the piston-rod, m; the quadrant, N; meansfor locking the lever, N, with the quadrant, N; avalve for controllingthe movement of steam to and from the cylinder; a lever, B, foropcrating said valve; a connection between said lever and the workingpiston; the quadrant, R; means for setting the lever, B, on saidquadrant at different positions relatively to the different positions ofthe setting-piston, M, to effect a secondary movement of the valve,through the movement of the lever, as edected by the movement of theworking piston, after the setting of the lever, B, to bring the valve tonormal.

In a sawmill set-works, the combination of the log-moving mechanism; theworking piston, K, for effecting the movement of said mechanism; acylinder in which said piston operates; a setting-piston, M; piston-rod,on, extending therefrom; the lever, N; means for connecting said leverwith said rod, m; a quadrant, N; means for locking the lever, N, withsaid quadrant; steam -ohests having ports leading therefrom to theopposite ends of the cylinder; means for conveying the steam by thesetting-piston, M; a valve in the steamchest; and means for actuatingsaid valve.

34-. In a sawmill set-works, the combination of a log-moving mechanism;a working pistion for effecting the movement of said mechanism; acylinder in which said piston operates a setting-piston in saidcylinder; means for locking said setting-piston in various positions insaid cylinder; means for conveying the live steam by saidsetting-piston; an exhaust-port extending through said settingpiston; aplug on the working piston arranged to enter said exhaust-port and toapproximately but not entirely close said port.

35. In a sawmill set-works, the combination of the log-moving mechanism;aworking piston, K, for eifecting the movement of said mechanism; acylinder in which said piston operates; a setting-piston arranged insaid cylinder and having the opening, m means for locking saidsetting-piston in various positions in said cylinder; a port-tube, Q,arranged in the setting-piston; a steam-chest; means for connecting theport-tube, Q, therewith the plug, arranged in relation to the opening, mas described.

36. In asawmill set-works, the combination of the log-moving mechanism;a Working piston, K, for effecting the movement of said mechanism; acylinder in which said piston operates; a setting-piston arranged insaid cylinder and having the opening, m and port, m connecting theportions of the cylinder on the opposite sides of the setting-piston, M;means for locking said setting-piston in various positions in saidcylinder; a port-tube, Q, arranged in the setting-piston; a steam-chest;and means for connecting the port-tube, Q, therewith.

37. In a sawmill set-works, the combination with the log-movingmechanism; the ratchetlever, G, for effecting this movement; the block,I-I, thereon; the connecting-rod, L, secured to said block; thepiston-rod, 70, secured to said connecting-rod; the piston, K, alsosecured to the piston-rod; the cylinder, J, in which the said pistonoperates; the setting-piston, M, also in said cylinder; pistonrod, m,extending from the setting-piston and having the opening, m and port mtherein; the lever, N; means for connecting the pis ton-rod, m, withsaid lever; the quadrant, N; means for locking the lever, N,with said qnadrant; the port-tube, Q, extending through the piston, M; steam-chest,0, having the ports, 0, 0 and 0 leading therefrom to the ends of thecylinder; the port, 0, connecting with the port-tube, Q, the port, 0,with the rear end of the cylinder, the port, 0 and 0 with the front endof the cylinder; the valves, 13 and IIO p controlling said ports; thecentral portion, In testimony whereof I affix my signature 1), intowhich the port, 19 enters; the lever, in presence of two Witnesses. R,connected with said Valve; the link, 0",

connecting said valve-lever with the rod, k; JOHN WALTON 5 the quadrant,R, having the notches, 0, ar- Witnesses: ranged as described and for thepurposes de- G. S. WALTON,

scribed. O. D. REED.

